8/9/2019 Wall Thickness Calculation Notes
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A. Design Data
Standard Applied for design calculation :
01. Type = Vertical rectangular atmospheric vessel
02. Shell Dimension (L x W x H)
Length = 2000 mm = 78.7
Width = 2000 mm = 78.7
Height = 2600 mm = 102.4
03. Internal design pressure = 38.0 psig = 2.7
04. Design temperature = 158.0 F = 70.0 C
05. Joint eff. For circumferential stress (shell) = 0.70
06. Modulus of elasticity (E) = psi (SA-516 Gr.70)
07. Operating Pressure = 15.3 psig = 1.1
08. Operating Temperatur = 81.0 F = 27.2 C
09. Corrosion allowance (C) = 3.0 mm = 0.12
10. Maximum Allowable Stress (S) = 20305 psi (SA-516 Gr.70)
B. Calculation for Thickness of Shell
The formula used for required plate thickness is
= P . R + C
where : S.E - 0.6 P
t =minimum required thickness - inch
P =pressure of liquid - psi
L = length of tank - inchS =maximum allowance stress
C =corrosion allowance - inch
1. Required of Stiffening
H 1 = 32 inch
H 2 = 40 inch
H 3 = 32 inch
h 1 = 32 inch
h 2 = 72 inch
h 3 = 104 inch
bar
inch
bar
SHELL THICKNESS CALCULATION NOTES
ASME VIII DIV. 1 Latest Edition
CPI SEPARATOR
29300000
WALL THICKNESS OF VERTICAL RECTANGULAR ATMOSPHERIC VESSEL
CAPACITY : 33.4 GPM
MATINDOK GAS DEVELOPMENT PROJECT
inch
inch
inch
=. +
MTDF-BBS-MS-0275-3320-A2204-1001_Rev.1
8/9/2019 Wall Thickness Calculation Notes
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SHELL THICKNESS CALCULATION NOTES
2. Load
where:
w = load - pound per inches
G =specific gravity of liquid, (content water)
= 1
w 1 = 0.58 lb/in
w 2 = 1.30 lb/in
w 3 = 1.87 lb/in
3. Stiffening Frame
R 1 = 0.40 psi
R 2 = 0.91 psi
4. Required Moment of Inertia
where
I =moment of inertia - inch4
R = reaction with subscript indicating the location - psi
E =modulus of elasticity - psi ; 29,300,000 for SA 516 Gr. 70 at
100 F
= psi
I1 = 3.35 inch4
I2 = 7.55 inch4
5. Pressure of Liquid
where
Pn = pressure of liquid
= 16.00
= 52.00
= 88.00
P1 = 0.58 psi
P2 = 1.87 psi
P3 = 3.17 psi
29300000
(h 1 + h 1-1)/2
(h 2 + h 2-1)/2
(h 3 + h 3-1)/2
=.
= .
=
=
.
+
MTDF-BBS-MS-0275-3320-A2204-1001_Rev.1
